We examined a handful of this season's Heisman candidates, as identifited by various media outlets, and compared how their production through Week 6 compared to the top three finishers in the Heisman Trophy voting from the last five years.

We also took a look at midseason Heisman Trophy rankings since 2012 — again, from various media experts — to see how they stacked up to the final results. Is it a good sign to be a Heisman front-runner in mid-October? Or does the winner usually rely on a strong second half to leapfrog early season favorites?

Ten of the 15 players that finished in the top three in Heisman voting since 2012 were quarterbacks, three were running backs, one was a wide receiver and one was a linebacker. Because quarterbacks and running backs so often win this award, let's look at them, first.

Here's a look at this year's top quarterbacks compared to QBs in the top three of Heisman voting in the last five years (listed in descending order of combined passing and rushing yards through the first six games of the season):

Quarterbacks

Player

School

Year

Passing Yards Through Six Games

Rushing Yards Through Six Games

Total TDs Through Six Games

Finish in Heisman Voting

Lamar Jackson

Louisville

2016

1,806

832

30

1st

Lamar Jackson

Louisville

2017

1,990

510

21

N/A

Johnny Manziel

Texas A&M

2012

1,680

676

24

1st

Jameis Winston

Florida State

2013

1,885

137

23

1st

Mason Rudolph*

Oklahoma State

2017

1,909

63

21

N/A

Jordan Lynch

Northern Illinois

2013

1,333

616

17

3rd

Luke Falk

Washington State

2017

2,000

-73

19

N/A

Marcus Mariota

Oregon

2014

1,621

290

22

1st

Baker Mayfield

Oklahoma

2016

1,803

104

19

3rd

Deshaun Watson

Clemson

2016

1,572

244

18

2nd

Sam Darnold

USC

2017

1,705

7

15

N/A

Baker Mayfield*

Oklahoma

2017

1,635

74

16

N/A

Deshaun Watson

Clemson

2015

1,423

234

16

3rd

Collin Klein

Kansas State

2012

1,074

510

17

3rd

A.J. McCarron

Alabama

2013

1,407

-21

11

2nd

* = player has appeared in only five games, not six, in 2017

And here are the running backs who could be in contention for the Heisman Trophy this season, and how they stack up against Heisman-contending running backs in the last five years:

Running Backs

Player

School

Year

Rushing Yards Through Six Games

Receiving Yards Through Six Games

Total TDs Through Six Games

Finish in Heisman Voting

Bryce Love

Stanford

2017

1,240

19

9

N/A

Rashaad Penny

San Diego State

2017

993

127

12

N/A

Melvin Gordon

Wisconsin

2014

1,046

27

14

2nd

Saquon Barkley

Penn State

2017

649

395

10

N/A

Christian McCaffrey

Stanford

2015

844

172

6

2nd

Derrick Henry

Alabama

2015

665

51

10

1st

The two outliers in Heisman voting in the past five years are former Alabama wide receiver Amari Cooper, currently of the Oakland Raiders, and former Notre Dame linebacker Manti Te'o, currently of the New Orleans Saints. In the last five years, they are the only players at their positions to finish in the top three in Heisman Trophy voting. Michigan's Charles Woodson was the last non-quarterback/running back to win the award. He won in 1997 as a cornerback who also saw time as a wide receiver and returner.

Here's a year-by-year breakdown of how the Heisman race has looked at midseason for the past five years, and how it eventually worked out:

2017

Through six weeks of this season, Penn State running back Saquon Barkley appears to be nearly a consensus favorite to win the Heisman. Stanford's Bryce Love, another running back, is on his heels, followed by quarterbacks Baker Mayfield and Luke Falk.

Regardless of who's ahead, prognosticators like running backs this season: Three of the top-five Heisman candidates at this point in the season are running backs. There weren't any running backs in the top five last year, and we haven't seen that many among the top-five finishers since 2006.

Recent history shows that being the midseason Heisman frontrunner is a double-edged sword. It paid off for Lamar Jackson last season. He got off to an electric start and never loosened his grip on the trophy. As you'll see below, other October Heisman favorites weren't as lucky.

2016

Jackson had moved into the pole position by Week 6 as the Heisman favorite and his production remained strong in the second half of the season. He won the award even as Louisville suffered a couple of late-season losses.

Future Heisman prognosticators will be hard-pressed to be as clairvoyant as they were in 2016. Not only did Jackson win, but Clemson quarterback Deshaun Watson finished second, matching what many expected through the first month and a half of the season. Michigan's do-it-all defender/returner/offensive utility player Jabrill Peppers was a longshot to win the award, but his fifth-place finish generally matched expectations.

2015

Two seasons ago, there was a clear pecking order among the Heisman Trophy favorites at midseason: LSU running back Leonard Fournette, TCU quarterback Trevone Boykin and Ohio State running back Ezekiel Elliott. None finished among the top five in Heisman votes by the season's end. They finished sixth, 10th, and eighth, respectively.

A pair of running backs — Alabama's Derrick Henry and Stanford's Christian McCaffrey — who were largely absent from the Heisman radar at midseason, finished 1-2.

Fournette, a unanimous pick to win the Heisman at midseason by major outlets, fell out of the race when LSU lost three games in a row in November, including back-to-back weeks in which he was held to less than 100 rushing yards. A four-interception performance by Boykin in a 57-35 loss to Oklahoma State, followed by an ankle injury the following week, ended the TCU quarterback's Heisman hopes.

2014

All things considered, midseason Heisman projections in 2014 weren't terribly inaccurate. Marcus Mariota and Dak Prescott, who have both continued their college stardom in the NFL, were viewed as the front-runners, but the order may have varied depending on who you asked. Mariota ended up winning as Oregon rolled off a nine-game winning streak behind its quarterback's 42:4 touchdown-to-interception ratio.

2013

By mid-October, the Heisman appeared to be a two-horse race between Johnny Manziel and Marcus Mariota. Manziel won the award as a redshirt freshman the previous year and was attempting to join Archie Griffin as the only players to win the trophy twice. Mariota ultimately won the Heisman in 2014 but didn't finish in the Top 10 in 2013; Oregon's final six regular-season games included two losses, a pair of two-interception games by Mariota and the quarterback's declining production as a runner.

Jameis Winston was on the Heisman Trophy midseason radar in 2013 but largely viewed as an outside candidate behind Mariota, Manziel and Clemson's Tajh Boyd. Florida State had played only five games through Oct. 18, 2013 and only one was against a ranked opponent — a 63-0 drubbing of then-No. 25 Maryland. Winston's candidacy gained momentum as the Seminoles defeated No. 3 Clemson on the road, along with blowout wins over No. 7 Miami (Florida) and No. 20 Duke.

The second- through fourth-place finishers in Heisman voting were nowhere to be found at midseason. Alabama quarterback A.J. McCarron finished second as the Crimson Tide rolled all season before suffering back-to-back losses to Auburn and Oklahoma. Northern Illinois signal caller Jordan Lynch made a run at it, and Boston College running back Andre Williams' 2,177 rushing yards and 18 touchdowns fueled a top-five finish.

2012

Midseason projections from 2012 proved harder to find, but the ones available showed a trio of quarterbacks — West Virginia's Geno Smith, Kansas State's Collin Klein and Ohio State's Braxton Miller — as the favorites, with Smith being the front-runner. A quarterback won the award, just not the one most people expected in early-to-mid-October.

Texas A&M redshirt freshman Johnny Manziel, ranked fifth among Heisman contenders by USA Today and Sporting News at the midseason point five years ago, led the Aggies to a No. 9 ranking in the AP poll after road wins over No. 23 Louisiana Tech, No. 17 Mississippi State and, most notably, No. 1 Alabama.